The French frigate Alcmène was an Armide-class frigate of a nominal 44 guns, launched in 1811. The British captured her on 1814. The Royal Navy named her HMS Dunira, and then renamed her HMS Immortalite but never commissioned her nor fitted her for sea. In March 1822 she became a receiving ship at Portsmouth. She was sold in January 1837. In 1813, along with Iphigénie, she served at Cherbourg, in the squadron of contre-amiral Amable Troude, to protect the harbour.